Battery package

Abstract

A battery package according to one embodiment of the present invention comprises: a battery cell stack including a plurality of battery cells; a tray having a bottom portion and side portions, wherein the battery cell stack is accommodated in an internal space formed by the bottom portion and side portions; and at least one fixing member for fixing the battery cell stack.

Description

Technology Field

[0001] The present invention relates to a battery package, and more specifically, to a battery package for transporting a plurality of battery cells. Background Technology

[0002] In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras has become commonplace, the development of technologies related to such mobile devices is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0004] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte.

[0005] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0006] In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, battery modules in which multiple battery cells are electrically connected are used. In such battery modules, capacity and output are improved by connecting multiple battery cells in series or parallel to form a stack of battery cells. In addition, one or more battery modules can be mounted together with various control and protection systems, such as a Battery Disconnect Unit (BDU), a Battery Management System (BMS), and a cooling system, to form a battery pack.

[0007] When assembling a battery pack, it is common practice to first assemble battery modules and then add various control and protection systems, such as Battery Disconnect Units (BDUs), Battery Management Systems (BMS), and cooling systems, to these modules to complete the battery pack. Conventional battery packs are manufactured by placing battery modules within a housing structure, such as a pack tray, and these packs are then mounted on vehicles. Consequently, to manufacture battery packs, battery modules in the form of battery cells housed within module frames were transported in the past.

[0008] Figure 1 is a schematic diagram illustrating a conventional method of transporting a battery module.

[0009] Referring to FIG. 1, conventionally, when a battery module (10) is manufactured by housing multiple battery cells in a module frame, a tray (30) and an outer case (20) are used to transport the battery module (10). To protect the battery module (10), the battery module (10) is placed in the tray (30) and transported while placed in the outer case (20). However, in this conventional method, there is a gap for assembly between the tray (30) and the outer case (20), so there is a high possibility that the battery module (10) will shake during transport. Therefore, it is necessary to develop a structure that can prevent shaking during transport. The problem to be solved

[0010] The problem that the present invention aims to solve is to provide a battery package capable of preventing shaking of a battery cell stack during transportation and fixing and protecting the battery cell stack.

[0011] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention. means of solving the problem

[0012] A battery package according to one embodiment of the present invention comprises: a battery cell stack including a plurality of battery cells; a tray having a bottom portion and side portions, wherein the battery cell stack is accommodated in an internal space formed by the bottom portion and side portions; and at least one fixing member for fixing the battery cell stack.

[0013] The battery package may further include at least one pressure plate positioned vertically with respect to one surface of the bottom portion in the internal space.

[0014] The above-mentioned fixing member may be a cam clamp located between the pressure plate and the side portion.

[0015] The above cam clamp may include a cam shaft; and a cam portion connected to the cam shaft, and the cam portion may rotate asymmetrically about the cam shaft.

[0016] The above cam portion may be circular or elliptical, and the cam shaft may be connected to the cam portion in the area between the center and the circumference of the cam portion.

[0017] The above-mentioned fixed member may be a spring member located between the pressure plate and the side portion.

[0018] The above-mentioned fixed member may be positioned so that an elastic force acts toward the above-mentioned pressure plate.

[0019] The above fixing member may be a bolt member that penetrates a through hole formed in the side portion.

[0020] Screw threads may be formed on the inner surface of the above-mentioned through hole, and the fixing member may press the pressure plate by bolting the fixing member.

[0021] A protective member may be located on one side of the above-mentioned pressure plate facing the battery cell stack.

[0022] The above fixing member may be a strap member that wraps around at least a portion of the outer surfaces of the battery cell laminate.

[0023] A protective member may be positioned between the fixed member and the battery cell stack.

[0024] The battery package may further include a handling case in which the battery cell stack and the tray are stored together.

[0025] The above fixing member is provided in the handling case or the tray and can press the sides of the battery cell stack. For each of the mutually facing sides of the battery cell stack, the fixing member may press in the direction in which the sides face each other.

[0026] The above fixing member may be a toggle clamp.

[0027] The above handling case may include a plurality of columns extending along the height direction and a plurality of horizontal rods extending along the horizontal direction perpendicular to the columns, and the columns and the horizontal rods may form the exterior of the handling case.

[0028] The above battery cells are pouch-type battery cells and can be stacked along one direction within a battery cell stack. Effects of the invention

[0029] According to embodiments of the present invention, a battery cell stack is continuously pressed within a tray in which the battery cell stack is accommodated, thereby preventing shaking during transport and fixing and protecting the battery cell stack.

[0030] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0031] Figure 1 is a schematic diagram illustrating a conventional method of transporting a battery module. FIG. 2 is a perspective view showing a battery cell stack included in a battery package according to one embodiment of the present invention. Figure 3 is a top view of the battery cell stack of Figure 2. Figure 4 is an exploded perspective view of the battery cell stack of Figure 2. FIG. 5 is a perspective view showing one of the battery cells included in the battery cell stack of FIG. 2. FIG. 6 is a top view of a battery package according to one embodiment of the present invention. Figures 7 (a) and (b) are drawings showing a fixing member included in the battery package of Figure 6. FIG. 8 is a top view of a battery package according to another embodiment of the present invention. FIG. 9 is a top view of a battery package according to another embodiment of the present invention. FIG. 10 is a top view of a battery package according to another embodiment of the present invention. Figure 11 is a cross-sectional view showing a cross-section cut along the cutting line A-A' of Figure 10. FIG. 12 is a perspective view showing a battery package according to one embodiment of the present invention. FIG. 13 is a partial perspective view showing an enlarged view of a fixing member applied to the battery package of FIG. 12. FIG. 14 is a perspective view showing a battery package according to another embodiment of the present invention. Specific details for implementing the invention

[0032] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0033] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0034] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0035] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" facing the opposite direction of gravity.

[0036] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0037] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0038] FIG. 2 is a perspective view showing a battery cell stack included in a battery package according to an embodiment of the present invention. FIG. 3 is a top view of the battery cell stack of FIG. 2. FIG. 4 is an exploded perspective view of the battery cell stack of FIG. 2. FIG. 5 is a perspective view showing one of the battery cells included in the battery cell stack of FIG. 2.

[0039] Referring to FIGS. 2 to 5, a battery package according to one embodiment of the present invention includes a battery cell stack (120) comprising a plurality of battery cells (110). A tray in which the battery cell stack (120) is accommodated and a fixing member for fixing the battery cell stack will be described later.

[0040] The battery cell (110) according to the present embodiment may be a battery cell of various shapes, for example, a pouch-type battery cell, a prismatic battery cell, or a cylindrical battery cell. For example, as shown in FIGS. 2 to 5, the battery cell (110) according to the present embodiment may be a pouch-type battery cell. Although the following description focuses on a pouch-type battery cell, the battery cell (110) according to the present embodiment is not limited thereto and various types of battery cells may be applied.

[0041] The battery cell (110) according to the present embodiment may be in the form in which an electrode assembly having electrode leads (111) protruding in one or both directions is housed in a pouch case (114). Such a battery cell (110) may be in the shape of a rectangular sheet. The battery cell (110) may be formed by housing an electrode assembly in a pouch case (114) of a laminate sheet comprising a resin layer and a metal layer, and then bonding the outer periphery of the pouch case (114). For example, the battery cell (110) may have a structure in which two electrode leads (111) face each other and protrude from one end (114a) and the other end (114b) of the cell body (113), respectively. As another embodiment, a structure in which all electrode leads (111) of the battery cell (110) protrude in one direction is also possible. One of the electrode leads (111) is a positive electrode lead, and the other is a negative electrode lead.

[0042] A battery cell (110) can be manufactured by bonding the two ends (114a, 114b) of a pouch case (114) and the one side (114c) connecting them, while the electrode assembly (not shown) is housed in the pouch case (114). In other words, a battery cell (110) according to one embodiment of the present invention has a total of three sealing portions (114s), and the sealing portions (114s) are sealed by a method such as fusion, and the other side may be formed as a folding portion (115). That is, the battery cell (110) according to the present embodiment may be a pouch-type secondary battery in which the electrode assembly is housed inside the pouch case (114) and the outer periphery of the pouch case (114) is sealed to form the sealing portions (114s). In FIG. 5, only the sealing portions (114s) formed on both ends (114a, 114b) of the pouch case (114) are shown, and the sealing portion on the side facing the folding portion (115) is not shown, but the sealing portion on the side facing the folding portion (115) may be folded to one side after sealing is completed for space utilization.

[0043] The pouch case (114) of the laminate sheet may include an inner resin layer for sealing, a metal layer for preventing penetration of material, and an outermost resin layer. Based on the electrode assembly inside the pouch case (114), the inner resin layer may be located at the innermost position, the outer resin layer at the outermost position, and the metal layer may be located between the inner resin layer and the outer resin layer.

[0044] The outer resin layer may possess excellent tensile strength and weather resistance relative to its thickness and electrical insulation properties to protect the electrode assembly from the outside. This outer resin layer may include polyethylene terephthalate (PET) resin or nylon resin. The metal layer may prevent air, moisture, etc. from entering the interior of the pouch-type secondary battery. This metal layer may include aluminum (Al). The inner resin layers may be thermally fused together by applied heat and / or pressure while the electrode assembly is embedded. This inner resin layer may include casted polypropylene (CPP) or polypropylene (PP).

[0045] A pouch case (114) may be divided into two parts, and a concave-shaped storage portion may be formed in at least one of the two parts so that an electrode assembly can be seated thereon. Along the outer circumference of this storage portion, the inner resin layers of the two parts of the pouch case (114) may be bonded together to form a sealing portion (114s). In this way, the pouch case is sealed so that a battery cell (110), which is a pouch-type secondary battery, can be manufactured.

[0046] In a battery cell stack (120), the battery cells (110) may be configured in multiple numbers. For example, multiple battery cells (110) may be stacked along one direction to form a battery cell stack (120) so that they can be electrically connected to each other. For example, multiple battery cells (110) may be stacked upright along a direction parallel to the X-axis. Accordingly, electrode leads (111) may protrude in a direction perpendicular to the direction in which the battery cells (110) are stacked. In a battery cell (110), one electrode lead (111) may protrude toward the Y-axis direction, and another electrode lead (111) may protrude toward the -Y-axis direction. If the electrode leads (111) are in a battery cell that protrude in only one direction, the electrode leads (111) may protrude toward the Y-axis direction or the -Y-axis direction.

[0047] Meanwhile, the battery cell stack (120) according to the present embodiment may include busbar frames (130) that cover one side and the opposite side, respectively, in the direction in which the electrode lead (111) protrudes. The busbar frames (130) may include an electrical insulating material and may prevent a short circuit from occurring when the busbar (131) or terminal busbar (132), described later, comes into contact with other parts of the battery cell (110) other than the electrode lead (111).

[0048] Each busbar frame (130) may be equipped with a busbar (131), a terminal busbar (132), etc. Specifically, the busbar (131) and the terminal busbar (132) may be mounted on the opposite side of the busbar frame (130) facing the battery cells (110). The busbar (131) may be electrically connected to the electrode lead (111) of the battery cell (110). For example, the busbar (131) and the electrode lead (111) may be joined by a welding method. A slit may be formed in the busbar frame (130), and the electrode lead (111) may pass through this slit to be connected to the busbar (131). The battery cells (110) may be electrically connected in series or parallel via this busbar (131).

[0049] The terminal busbar (132) can be electrically connected to the electrode lead (111), and a portion of it may be exposed to the outside. The exposed portion of the terminal busbar (132) may form a High Voltage (HV) connection with another battery cell stack or electrical component. Here, the HV connection refers to a connection between battery cells, serving as a power source to supply power requiring high voltage.

[0050] Meanwhile, the battery cell stack (120) may further include a pad member (140). The pad member (140) may be placed between the battery cells (110). Additionally, the pad member (140) may be placed on each of the two sides of the battery cell stack (120) in the direction in which the battery cells (110) are stacked. During the process of repeated charging and discharging, the internal electrolyte of the battery cells (110) decomposes and gas is generated, causing the battery cells (110) to swell, i.e., a swelling phenomenon may occur. In the swelling phenomenon of the battery cells (110), the battery cells (110) may expand in the direction in which the battery cells (110) are stacked (a direction parallel to the X-axis). The pad member (140) according to the present embodiment absorbs the swelling of the battery cells (110), thereby preventing the battery cell stack (120) from deforming beyond its deformation limit due to the swelling of the battery cells (110).

[0052] Hereinafter, a battery package (100a) according to one embodiment of the present invention will be described in detail with reference to FIGS. 6 and FIGS. 7.

[0053] FIG. 6 is a top view of a battery package according to an embodiment of the present invention. FIG. 7 (a) and (b) are drawings showing a fixing member included in the battery package of FIG. 6.

[0054] Referring to FIGS. 6 and 7 together with FIGS. 2 to 5, a battery package (100a) according to one embodiment of the present invention comprises: a battery cell stack (120) comprising a plurality of battery cells (110); a tray (200) having a bottom portion (210) and a side portion (220), wherein the battery cell stack (120) is accommodated in an internal space formed by the bottom portion (210) and the side portion (220); and at least one fixing member (300a) for fixing the battery cell stack (120). In the present invention, the term "battery package" refers to a unit for transporting a battery cell stack (120) comprising a plurality of battery cells (110) during the process of manufacturing a battery pack, etc.

[0055] As described above, the tray (200) may include a bottom portion (210) and side portions (220), and a battery cell stack (120) is accommodated in the internal space formed by the bottom portion (210) and side portions (220). That is, the battery cell stack (120) is placed on the bottom portion (210), and the side portions (220) can cover the sides of the battery cell stack (120). The tray (200) may include a material resistant to external impact, such as steel, aluminum (Al), plastic, or reinforced plastic.

[0056] Meanwhile, unlike the conventional method of manufacturing battery modules by housing battery cell stacks in a module frame and placing these modules in a pack frame, simplified structures such as CTP (Cell to Pack), in which battery cell stacks are placed directly in a pack frame, are being applied recently. By omitting the module frame, space utilization at the battery pack level is increased, and it is possible to improve overall energy density and reduce weight. To manufacture a battery pack with such a simplified structure, the process of assembling and transporting battery cell stacks is essential. The battery package according to the present embodiment may be configured for transporting battery cell stacks rather than transporting battery modules.

[0057] In the battery package according to the present embodiment, since a battery cell stack is being transported rather than a battery module, a means is required to continuously pressurize the battery cell stack to prevent shaking during transport and to fix and protect the battery cell stack. As such a means, a fixing member (300a) according to the present embodiment will be described.

[0058] The battery package (100a) according to the present embodiment may further include at least one pressure plate (400) positioned vertically with respect to one side of the bottom portion (210) in the internal space, and the fixing member (300a) according to the present embodiment may be a cam clamp positioned between the pressure plate (400) and the side portion (220).

[0059] Specifically, the fixed member (300a), which is a cam clamp, may include a cam shaft (310a); and a cam portion (320a) connected to the cam shaft (310a). The cam portion (320a) may rotate asymmetrically around the cam shaft (310a). For example, the cam portion (320a) may be circular or elliptical, and the cam shaft (310a) may be connected to the cam portion (320a) in the area between the center and the circumference of the cam portion (320a).

[0060] That is, depending on the asymmetric rotation of the cam portion (320a), the pressure plate (400) can move in the direction where the battery cell stack (120) is located to press the battery cell stack (120), and the pressure plate (400) can move in the opposite direction to where the battery cell stack (120) is located to secure a gap between the pressure plate (400) and the battery cell stack (120).

[0061] Based on the above structure, the process of fixing the battery cell stack (120) in the internal space of the tray (200) is described. As shown in FIG. 7 (a), the long axis of the cam part (320a) is made parallel to one side of the pressure plate (400) to secure space between the pressure plates (400). In this state, the battery cell stack (120) is placed between the pressure plates (400). Afterward, as shown in FIG. 7 (b), the cam part (320a) is rotated so that the short axis of the cam part (320a) is parallel to one side of the pressure plate (400). As the cam part (320a) rotates, the pressure plate (400) presses the battery cell stack (120), and the battery cell stack (120) can be fixed without shaking in the internal space of the tray (200).

[0062] Meanwhile, a protective member (500) may be positioned on one side of the pressure plate (400) facing the battery cell stack (120). Since direct pressure from the pressure plate (400) may damage the battery cell stack (120), a protective member (500) may be provided on one side of the pressure plate (400). Additionally, the protective member (500) can mitigate shaking and shock during transport. It is preferable that the protective member (500) include a compressible material, and for example, it may include one or more materials selected from the group consisting of expanded polypropylene (EPP), urethane, and silicone.

[0063] Meanwhile, for each of the mutually facing sides of the battery cell stack (120), pressure can be applied by the fixing member (300a) in the direction in which the sides face each other. The battery cell stack (120) can be fixed as the pressure of the fixing member (300a) applied in the mutually facing direction is balanced. Specifically, the battery cell stack (120) may have a first side (121), a second side (122), a third side (123), and a fourth side (124). Here, the first side (121) and the second side (122) may be the sides where the pad member (140) is located, and the third side (123) and the fourth side (124) may be the sides where the busbar frame (130) is located. For each of the first side (121) and the second side (122) facing each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300a) in the direction in which the first side (121) and the second side (122) face each other. Pressure can be applied by the fixing member (300a) in the X-axis direction to the first side (121), and pressure can be applied by the fixing member (300a) in the -X-axis direction to the second side (122).

[0064] Additionally, for each of the third side (123) and the fourth side (124) facing each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300a) in the direction in which the third side (123) and the fourth side (124) face each other. Pressure can be applied by the fixing member (300a) in the Y-axis direction to the third side (123), and pressure can be applied by the fixing member (300a) in the -Y-axis direction to the fourth side (124).

[0065] In this embodiment, it is preferable that pressure is applied by a fixing member (300a) in a direction toward each of the four sides (121, 122, 123, 124) of the battery cell stack (120).

[0066] Hereinafter, with reference to FIG. 8, a battery package (100b) according to another embodiment of the present invention will be described in detail.

[0067] FIG. 8 is a top view of a battery package according to another embodiment of the present invention.

[0068] Referring to FIG. 8, a battery package (100b) according to another embodiment of the present invention may include a battery cell stack (120), a tray (200), at least one fixing member (300b), and at least one pressure plate (400). To avoid repetition of description, descriptions of configurations that overlap with those previously described are omitted.

[0069] The fixed member (300b) according to the present embodiment may be a spring member located between the pressure plate (400) and the side portion (220). The fixed member (300b), which is a spring member, may be positioned so that an elastic force acts toward the pressure plate. Furthermore, as long as an elastic force acts toward the pressure plate, there are no special limitations on the type and number of spring members. For example, the fixed member (300b) may be a coil spring or a leaf spring.

[0070] Based on the above structure, the process of fixing the battery cell stack (120) in the internal space of the tray (200) is described. Force is applied to the pressure plate (400) to compress the fixing member (300b), which is a spring member, and a space is secured between the pressure plates (400). In this state, the battery cell stack (120) is placed between the pressure plates (400). Afterward, when the force applied to the pressure plate (400) is removed, the pressure plate (400) presses the battery cell stack (120) due to the elastic force of the fixing member (300b), and the battery cell stack (120) can be fixed without shaking in the internal space of the tray (200).

[0071] Meanwhile, for each of the mutually facing sides of the battery cell stack (120), pressure can be applied by the fixing member (300b) in the direction in which the sides face each other. The battery cell stack (120) can be fixed as the pressure of the fixing member (300b) applied in the mutually facing direction is balanced. Specifically, for each of the mutually facing first side (121) and second side (122) among the mutually facing sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300b) in the direction in which the first side (121) and the second side (122) face each other. Pressure can be applied by the fixing member (300b) in the X-axis direction to the first side (121), and pressure can be applied by the fixing member (300b) in the -X-axis direction to the second side (122).

[0072] Additionally, for each of the third side (123) and the fourth side (124) facing each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300b) in the direction in which the third side (123) and the fourth side (124) face each other. Pressure can be applied by the fixing member (300b) in the Y-axis direction to the third side (123), and pressure can be applied by the fixing member (300b) in the -Y-axis direction to the fourth side (124).

[0073] In this embodiment, it is preferable that pressure is applied by a fixing member (300b) in a direction toward each of the four sides (121, 122, 123, 124) of the battery cell stack (120).

[0074] Hereinafter, with reference to FIG. 9, a battery package (100c) according to another embodiment of the present invention will be described in detail.

[0075] FIG. 9 is a top view of a battery package according to another embodiment of the present invention.

[0076] Referring to FIG. 9, a battery package (100c) according to another embodiment of the present invention may include a battery cell stack (120), a tray (200), at least one fixing member (300c), and at least one pressure plate (400). To avoid repetition of description, descriptions of configurations that overlap with those previously described are omitted.

[0077] The fixing member (300c) according to the present embodiment may be a bolt member that penetrates a through hole formed in the side portion (220). That is, the fixing member (300c), which is a bolt member with screw threads formed on its outer surface, may be positioned to pass through the through hole. Additionally, screw threads may be formed on the inner surface of the through hole, and the fixing member (300c) may press the pressure plate (400) by bolting the fixing member (300c). Bolting refers to the process of tightening and loosening the fixing member (300c).

[0078] Based on the above structure, the process of fixing the battery cell stack (120) in the internal space of the tray (200) is described. The fixing member (300c) is loosened to secure the space between the pressure plates (400). In this state, the battery cell stack (120) is placed between the pressure plates (400). Afterward, the fixing member (300c) is tightened so that the fixing member (300c) presses the pressure plates (400) and the pressure plates (400) press the battery cell stack (120). Accordingly, the battery cell stack (120) can be fixed without shaking in the internal space of the tray (200).

[0079] Meanwhile, for each of the mutually facing sides of the battery cell stack (120), pressure can be applied by the fixing member (300c) in the direction in which the sides face each other. The battery cell stack (120) can be fixed as the pressure of the fixing member (300c) applied in the mutually facing direction is balanced. Specifically, for each of the mutually facing first side (121) and second side (122) among the mutually facing sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300c) in the direction in which the first side (121) and the second side (122) face each other. Pressure can be applied by the fixing member (300c) in the X-axis direction to the first side (121), and pressure can be applied by the fixing member (300c) in the -X-axis direction to the second side (122).

[0080] Additionally, for each of the third side (123) and the fourth side (124) facing each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure can be applied by the fixing member (300c) in the direction in which the third side (123) and the fourth side (124) face each other. Pressure can be applied by the fixing member (300c) in the Y-axis direction to the third side (123), and pressure can be applied by the fixing member (300c) in the -Y-axis direction to the fourth side (124).

[0081] In this embodiment, it is preferable that pressure is applied by a fixing member (300c) in a direction toward each of the four sides (121, 122, 123, 124) of the battery cell stack (120).

[0083] Hereinafter, a battery package (100d) according to another embodiment of the present invention will be described in detail with reference to FIGS. 10 and 11.

[0084] FIG. 10 is a top view of a battery package according to another embodiment of the present invention. FIG. 11 is a cross-sectional view showing a cross section cut along the cutting line A-A' of FIG. 10.

[0085] Referring to FIGS. 10 and 11, a battery package (100d) according to another embodiment of the present invention may include a battery cell stack (120), a tray (200), and at least one fixing member (300d). To avoid repetition of description, descriptions of configurations that overlap with those previously described are omitted.

[0086] The fixing member (300d) according to the present embodiment may be a strap member that wraps at least a portion of the outer surfaces of the battery cell stack (120).

[0087] The fixing members (300d) may be multiple and may extend along the upper surface, both sides, and the lower surface of the battery cell stack (120). On the upper or lower surface of the battery cell stack (120), some fixing members (300d) may extend along the direction in which the battery cells (110) are stacked, and other fixing members (300d) may extend along a direction perpendicular to the direction in which the battery cells (110) are stacked. Although there are no limitations on the method, it is preferable for multiple fixing members (300d) to wrap around the battery cell stack (120) in multiple directions so that the movement of the battery cells (110) can be firmly restricted. Additionally, for example, a fixing member (300d) that is a strap member may wrap around the battery cell stack (120), and the fixing member (300d) may be fixed by a clamp (310d) as shown in FIG. 11.

[0088] Meanwhile, a protective member (500) may be positioned between the fixing member (300d) and the battery cell stack (120). This protective member (500) can prevent the fixing member (300d), which is a strap member, from damaging the battery cell stack (120). Additionally, the protective member (500) can mitigate shaking and shock during transport. It is preferable that the protective member (500) include a compressible material, and for example, it may include one or more materials selected from the group consisting of expanded polypropylene (EPP), urethane, and silicone.

[0089] Meanwhile, a block (600) that restricts the movement of the battery cell stack (120) may be disposed in the space between the battery cell stack (120) wrapped in the strap member and the side portion (220).

[0090] Based on the above structure, the process of fixing the battery cell stack (120) in the internal space of the tray (200) is described. The battery cell stack (120) is wrapped with a fixing member (300d), which is a strap member, and fixed with a clamp (310d). By arranging the battery cell stack (120) to be fixed between the blocks (600), the battery cell stack (120) can be fixed without shaking in the internal space of the tray (200).

[0092] FIG. 12 is a perspective view showing a battery package according to one embodiment of the present invention. FIG. 13 is a partial perspective view showing an enlarged fixing member applied to the battery package of FIG. 12.

[0093] Referring to FIGS. 12 and 13, the battery package according to the present embodiment may further include a handling case (700) in which a battery cell stack (120) and a tray (200) are stored together. That is, the battery cell stack (120) may be stored in the handling case (700) while being accommodated in the tray (200). At this time, a plurality of battery cell stacks (120) may be stored in the handling case (700), and each of the battery cell stacks (120) may be in a state of being accommodated in the tray (200). As described above, the tray (200) may have a bottom portion (210) and a side portion (220).

[0094] A fixing member (300e) is provided in a handling case (700) or a tray (200) and can press the sides of a battery cell stack (120). FIGS. 12 and 13 show that the fixing member (300e) is provided in a handling case (700). Here, pressing the sides of the battery cell stack (120) includes not only cases where the fixing member presses directly while contacting the sides of the battery cell stack (120), but also cases where an additional member or a tray (200), etc., is positioned between the battery cell stack (120) and the fixing member so that the fixing member presses the sides of the battery cell stack (120) indirectly.

[0095] For each of the mutually facing sides of the battery cell stack (120), pressure can be applied by the fixing member (300e) in the direction in which the sides face each other. The battery cell stack (120) can be fixed as the pressure of the fixing member (300e) applied in the mutually facing direction is balanced. In this embodiment, it is preferable that pressure is applied by the fixing member (300e) in each of the four sides of the battery cell stack (120) in the direction toward each of the four sides. In this way, when the fixing member (300e) is also provided in the handling case (700), the entire battery cell stack (120) and the tray (200) can be fixed within the handling case (700).

[0096] More specifically, the side portion (220) of the tray (200) may have a first side portion (221), a second side portion (222), a third side portion (223), and a fourth side portion (224). For each of the first side portion (221) and the second side portion (222) facing each other among the side portions (220) of the tray (200), pressure of the fixing member (300e) may be applied in the direction in which the first side portion (221) and the second side portion (222) face each other. Additionally, for each of the third side portion (223) and the fourth side portion (224) facing each other among the side portions (220) of the tray (200), pressure of the fixing member (300e) may be applied in the direction in which the third side portion (223) and the fourth side portion (224) face each other.

[0097] The fixing member (300e) according to the present embodiment has no particular limitation in shape as long as a compressive force can be applied in one direction. For example, the fixing member (300e) may be a toggle clamp. A toggle clamp is a device that utilizes the principle of a lever and can apply a large compressive force in one direction to a desired location by operating a lever once with a small force.

[0099] FIG. 14 is a perspective view showing a battery package according to another embodiment of the present invention.

[0100] Referring to FIG. 14, in another embodiment of the present invention, the battery package may further include a handling case (700) in which a battery cell stack (120) and a tray (200) are stored together. As described above, the battery cell stack (120) may be stored in the handling case (700) while being accommodated in the tray (200). Additionally, a plurality of battery cell stacks (120) may be stored in the handling case (700), and each of the battery cell stacks (120) may be in a state of being accommodated in the tray (200). As described above, the tray (200) may have a bottom portion (210) and a side portion (220).

[0101] A fixing member (300e) is provided in a tray (200) and can press the sides of a battery cell stack (120). FIG. 14 shows the fixing member (300e) provided in a tray (200).

[0102] As with the embodiment described above, for each of the mutually facing sides of the battery cell stack (120), pressure can be applied by the fixing member (300e) in the direction in which the sides (120) face each other. The battery cell stack (120) can be fixed while the pressure of the fixing member (300e) applied in the mutually facing direction is balanced. Additionally, it is preferable that pressure by the fixing member (300e) be applied in each of the four sides of the battery cell stack (120) in the direction toward each of the four sides. When the fixing member (300e) is provided in the tray (200) in this manner, each of the battery cell stacks (120) can be fixed within the tray (200).

[0103] More specifically, as described above, the battery cell stack (120) may have a first side (121), a second side (122), a third side (123), and a fourth side (124). For each of the first side (121) and the second side (122) that face each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure of the fixing member (300a) may be applied in the direction in which the first side (121) and the second side (122) face each other. Additionally, for each of the third side (123) and the fourth side (124) facing each other among the sides (121, 122, 123, 124) of the battery cell stack (120), pressure of the fixing member (300a) can be applied in the direction in which the third side (123) and the fourth side (124) face each other.

[0105] Meanwhile, referring to FIGS. 12 to 14 together, the handling case (700) according to the present embodiment may include a plurality of columns (710) extending along the height direction and a plurality of horizontal rods (720) extending along the horizontal direction perpendicular to the columns (710). Here, the height direction may be a virtual direction perpendicular to the ground, and the horizontal direction may be a virtual direction perpendicular to the height direction and parallel to the ground. The columns (710) and the horizontal rods (720) may form the exterior of the handling case (700).

[0106] Specifically, four columns (710) may be arranged in the four vertex regions of a virtual rectangle on a plane. Horizontal rods (720) may connect these four columns (710). That is, between two adjacent columns (710), a horizontal rod (720) may connect the two columns (710). Additionally, a plurality of horizontal rods (720) connecting the two columns (710) may be provided, and the horizontal rods (720) connecting the two columns (710) may be spaced apart at a predetermined interval along the height direction.

[0107] Columns (710) and horizontal rods (720) form the exterior of the handling case (700), and a battery cell stack (120) accommodated in a tray (200) can be stored and stacked in the interior space of the handling case (700). Here, the interior space of the handling case (700) is a space surrounded by columns (710) and horizontal rods (720).

[0108] Meanwhile, the handling case (700) according to the present embodiment may further include a bottom rod (730) on which a battery cell stack (120) accommodated in a tray (200) is placed, and an internal rod (740) that partitions the internal space of the handling case (700). The bottom rods (730) on which the battery cell stack (120) is placed may be in a shape similar to a horizontal rod (720) so that an open space is formed between them. The internal rod (740) may be a configuration provided to separate the space of the battery cell stacks (120) arranged along the lateral direction.

[0109] In the handling case (700) according to the present embodiment, the exterior is formed not by a plate-shaped member, but by a plurality of columns (710) and a horizontal rod (720). Accordingly, the weight per unit volume of the handling case (700) can be minimized while simultaneously ensuring structural rigidity. The handling case (700) may include a material resistant to external impact, such as steel, aluminum (Al), plastic, or reinforced plastic.

[0110] In addition, since space is provided between the columns (710) or between the horizontal rods (720), it is easy to transport the battery package. That is, the battery package can be transported by inserting a device for transporting the battery package into the space between the columns (710) or between the horizontal rods (720).

[0111] Additionally, a fixing member (300e) may be positioned in the open space between the columns (710) or between the horizontal rods (720). That is, as the open space between the columns (710) or between the horizontal rods (720) is closed, the fixing of the battery cell stack (120) can be controlled by adjusting the operation of the fixing member (300e) after the battery cell stack (120) in the tray (200) is placed in the handling case (700). If the handling case were a plate-shaped member, it would be difficult to control the operation of the fixing member after the battery cell stack (120) is placed in the handling case (700). In particular, if the fixing member (300e) is a toggle clamp, the operation of a lever is required to apply pressure for fixing, and the lever of the toggle clamp can be operated through the open space between the columns (710) or between the horizontal rods (720).

[0112] In this embodiment, terms indicating directions such as front, back, left, right, up, and down have been used; however, these terms are for convenience of explanation only and may vary depending on the location of the object or the position of the observer.

[0113] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0114] 100a, 100b, 100c, 100d: Battery Package 200: Tray 300a, 300b, 300c, 300d: Fixing members 400: Pressure plate 500: Absence of protection 600: Block

Claims

Claim 1 A battery package comprising: a battery cell stack including a plurality of battery cells; a tray having a bottom portion and side portions, wherein the battery cell stack is accommodated in an internal space formed by the bottom portion and the side portions; a handling case in which the battery cell stack and the tray are housed together; and at least one fixing member for fixing the battery cell stack; wherein the handling case includes a plurality of columns extending along a height direction and a plurality of horizontal rods extending along a horizontal direction perpendicular to the columns, wherein the horizontal rods are spaced apart along the height direction and the columns and the horizontal rods form the exterior of the handling case; wherein the fixing member is provided in the handling case or the tray to press the sides of the battery cell stack, and the pressing of the fixing member is performed on each of the mutually facing sides of the battery cell stack in the direction in which the sides face each other, wherein the fixing member is a toggle clamp and the fixing member is located in an open space between the columns or between the horizontal rods. Claim 2 A battery package according to claim 1, further comprising at least one pressure plate positioned perpendicularly to one surface of the bottom portion in the internal space. Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 delete Claim 10 A battery package in which, in paragraph 2, a protective member is located on one surface of the pressure plate facing the battery cell stack. Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 delete Claim 17 In claim 1, the battery cells are pouch-type battery cells, and the battery package is stacked along one direction within the battery cell stack.

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